Purification and rejuvenation of “Zhangping Qingrenwudou”(black soybean with green kernel) and its application

A series of experiment for purifying and rejuvenating local soybean variety “Zhangping Qingrenwudou” have been carried out since 2010. Ten strains were selected by individual selection, line and row comparison, strain identification, mixed strains reproduction and demonstration of selected variety. These 10 strains were reproduced for producing seeds, undertaking the demonstrative test and achieved the expected target. Among these strains, “QLW1037” and “QLW 1026” showed higher yield than original strain in continuously two years. Moreover, their technical indexes could meet the requirements and could become new potential strains.